1 files changed, 30 insertions, 0 deletions
diff --git a/widget/ColorScheme.h b/widget/ColorScheme.h
new file mode 100644
index 0000000000..5a8b1a6cdd
--- /dev/null
+++ b/widget/ColorScheme.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ColorScheme_h
+#define mozilla_ColorScheme_h
+
+#include <cstdint>
+
+namespace mozilla {
+
+// Whether we should use a light or dark appearance.
+enum class ColorScheme : uint8_t { Light, Dark };
+
+// The color-scheme we should get back in case it's not explicit. The "used"
+// mode is the mode that most of layout should use (defaults to light if the
+// page doesn't have a color-scheme property / meta-tag indicating otherwise).
+//
+// The "preferred" mode returns the color-scheme for purposes of
+// prefers-color-scheme propagation (that is, it defaults to the current
+// preferred color-scheme, rather than light).
+enum class ColorSchemeMode : uint8_t {
+  Used,
+  Preferred,
+};
+
+}  // namespace mozilla
+
+#endif